摘要
基于射线寻迹的原理,提出了一种对被动声源进行非视距定位的方法。非视距声信号通常经过绕射到达基阵,根据广义费马原理,传播路径为一条短程线。在地理信息已知和多个基阵已测得声信号波达方向的情况下,对绕射信号的短程线上的离散点进行了射线寻迹,然后分析寻迹结果得到了有用的声源位置信息。障碍物为圆柱形或球形构成的仿真结果表明,声源位置估计值分布于一段平滑单调的曲线上。
A new method of NLOS acoustic passive location based on ray tracing is presented. The NLOS sound signal usually arrives at acoustic array by diffraction,and the diffracted transmission path is a geodesic according to the extensive Famat＇ s principle. While the geographic information and more than one angle of arrival are known, the ray tracing is performed between the discrete points which on the diffracted signal＇s geodesics. The useful location information is obtained by analyzing the tracing results. Simulation results of columnar and globoid obstacles demonstrate that the estimate coordinates of sound source distribute on a segment of monotonic smooth curve.
出处
《现代电子技术》
2008年第7期14-16,共3页
Modern Electronics Technique
